Cast for Education is an app that works on Chrome OS, macOS and Windows. The app is launching in a public beta today and is available as a free download. The difference between Cast and other screen sharing solutions is network-independence.

DisplayNote

is an interactive tool that allows participants in a meeting or students in a classroom to share and view documents and notes on the screens of all participating PCs or tablets. Compatible with multiple operating systems such as Windows, Mac OS, Android, and iOS.

More on interactive presentations and wifi presentations in this IMS blog: